{% if items %}
    <ul class="site-header-navbar-submenu site-header-navbar-submenu-{{nesting}}">
        {% for sub_item in items %}
            <li>
                <a href="{{sub_item.url}}">{{sub_item.name}}</a>
                {% if sub_item.children %}
                    {% include "./menu.twig" with {"items": sub_item.children, "nesting": nesting+1 } %}
                {% endif %}
            </li>
        {% endfor %}
    </ul>
{% endif %}